Information transmission method, network device and terminal device

ABSTRACT

Provided are information transmission methods, network devices and terminal devices, which may reduce an access delay. The method includes that: a target cell acquires configuration information of a measured signal, the configuration information of the measured signal being used for a terminal device to send the measured signal according to the configuration information of the measured signal; the target cell determines a beam corresponding to at least one uplink transmission channel of the target cell according to the measured signal sent by the terminal device; and the target cell transmits the at least one uplink transmission channel through the beam corresponding to the at least one uplink transmission channel of the target cell.

RELATED APPLICATION

This application is an application under 35 U.S.C. 371 of InternationalApplication No. PCT/CN2016/113684 filed on Dec. 30, 2016, the entirecontents of which are incorporated herein by reference.

TECHNICAL FIELD

The application relates to the field of communication, and moreparticularly to an information transmission method, a network device anda terminal device.

BACKGROUND

In a 5th-Generation (5G) system (or called a New Radio (NR) system),coverage in different directions and areas may be implemented bymulti-beam. For uplink transmission, a network device has multipleuplink receiving beams, a terminal device has multiple uplinktransmitting beams, the uplink receiving beams are required to bematched with the uplink transmitting beams to acquire a good receivingeffect, and poor matching may cause poor uplink receiving performance orineffective reception.

A terminal device, when accessing a network device, is usually requiredto try different uplink transmitting beams to send signals, andmeanwhile, the network device is also required to try different uplinkreceiving beams to find the optimally matched uplink transmitting beamand uplink receiving beam. The network device usually corresponds to alarge number of uplink receiving beams, and thus a long access delaywill be caused for determining the specific uplink beam for sending arandom access related signal for access to the network device if theterminal device sequentially tries the signal condition that each uplinktransmitting beam is matched with each receiving beam of the networkdevice.

SUMMARY

The embodiments of the application provide information transmissionmethods, network devices and terminal devices, which may reduce anaccess delay.

In a first aspect, an information transmission method is provided. Themethod includes that a target cell acquires configuration information ofa measured signal, the configuration information of the measured signalbeing used for a terminal device to send the measured signal accordingto the configuration information of the measured signal; the target celldetermines a beam corresponding to at least one uplink transmissionchannel of the target cell according to the measured signal sent by theterminal device; and the target cell transmits the at least one uplinktransmission channel through the beam corresponding to the at least oneuplink transmission channel of the target cell.

Optionally, the method may further include that: the target celldetermines identification information of a beam corresponding to atleast one uplink transmission channel of the terminal device and/orresource information for transmission of the at least one uplinktransmission channel according to the measured signal sent by theterminal device.

The target cell sends a first notification message to a source cell, thefirst notification message including the identification information ofthe beam corresponding to the at least one uplink transmission channelof the terminal device and/or the resource information for transmissionof the at least one uplink transmission channel, which are/is determinedby the target cell.

Optionally, the configuration information of the measured signal mayinclude at least one of: information about a time-domain resource forsending the measured signal, information about a frequency-domainresource for sending the measured signal, information about a channel orsignal resource for sending the measured signal and a manner for sendingthe measured signal.

Optionally, the configuration information of the measured signal may bedetermined by negotiation between the source cell and the target cell.

Optionally, the operation that the target cell acquires theconfiguration information of the measured signal may include that: thetarget cell receives the configuration information of the measuredsignal from the source cell, the configuration information of themeasured signal being determined by the source cell according toinformation of a signal periodically sent by the terminal device.

Optionally, the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal device mayinclude a beam identifier or serial number of the beam corresponding tothe at least one uplink transmission channel of the terminal device.

The resource information for transmission of the at least one uplinktransmission channel may include at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the source cell and the target cell may belong to the samenetwork device.

Optionally, the source cell and the target cell may belong to differentnetwork devices.

In a second aspect, an information transmission method is provided,which may include that: a terminal device sends a measured signal, themeasured signal being used for a target cell to determine identificationinformation of a beam corresponding to at least one uplink transmissionchannel of the terminal device and/or resource information fortransmission of the at least one uplink transmission channel; and theterminal device receives a notification message from a source cell, thenotification message including the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel, which are/is determined bythe target cell.

Optionally, the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal device mayinclude a beam identifier or serial number of the beam corresponding tothe at least one uplink transmission channel of the terminal device.

The resource information for transmission of the at least one uplinktransmission channel may include at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the measured signal may be a signal periodically sent by theterminal device.

Optionally, the method may further include that: the terminal devicereceives configuration information of the measured signal from thesource cell, the configuration information of the measured signal beingdetermined by negotiation between the source cell and the target celland the configuration information of the measured signal being used forthe terminal device to send the measured signal according to theconfiguration information of the measured signal.

Optionally, the configuration information of the measured signal mayinclude at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal and a manner for sending the measuredsignal.

Optionally, the method may further include that: the terminal devicesends a random access signal on a resource indicated by the resourceinformation for transmission of the at least one uplink transmissionchannel through the beam corresponding to the identificationinformation, determined by the target cell, of the beam corresponding tothe at least one uplink transmission channel of the terminal device toaccess the target cell.

Optionally, the measured signal may further be configured for the targetcell to determine a beam corresponding to at least one uplinktransmission channel of the target cell.

Optionally, the source cell and the target cell may belong to a samenetwork device.

Optionally, the source cell and the target cell may belong to differentnetwork devices.

In a third aspect, an information transmission method is provided, whichmay include that: a source cell receives a first notification messagesent by a target cell, the first notification message includingidentification information of a beam corresponding to at least oneuplink transmission channel of a terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the target cell; and the source cellsends a second notification message to the terminal device, the secondnotification message including the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel, which are/is determined bythe target cell.

Optionally, the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal deviceand/or the resource information for transmission of the at least oneuplink transmission channel may be determined by measuring, by thetarget cell, a measured signal on a resource indicated by configurationinformation of the measured signal, and the measured signal may be sentby the terminal device on the resource indicated by the configurationinformation of the measured signal.

Optionally, the configuration information of the measured signal may bedetermined by negotiation between the source cell and the target cell.

Optionally, the configuration information of the measured signal may bedetermined by the source cell according to information of a signalperiodically sent by the terminal device, and the method may furtherinclude the following operation.

The source cell sends the configuration information of the measuredsignal to the target cell.

Optionally, the configuration information of the measured signal mayinclude at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal and a manner for sending the measuredsignal.

Optionally, the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal device mayinclude a beam identifier or serial number of the beam corresponding tothe at least one uplink transmission channel of the terminal device.

The resource information for transmission of the at least one uplinktransmission channel may include at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the source cell and the target cell may belong to the samenetwork device.

Optionally, the source cell and the target cell may belong to differentnetwork devices.

A fourth aspect provides a network device, which includes unitsexecuting the method in the first aspect or any optional implementationmodes thereof.

A fifth aspect provides a terminal device, which includes unitsexecuting the method in the second aspect or any optional implementationmodes thereof.

A sixth aspect provides a network device, which includes units executingthe method in the third aspect or any optional implementation modesthereof.

A seventh aspect provides a network device, which includes a memory, aprocessor and a transceiver. The memory is configured to store aprogram, the processor is configured to execute the program, and whenthe program is executed, the processor executes the method in the firstaspect and any optional implementation modes thereof on the basis of thetransceiver.

An eighth aspect provides a terminal device, which includes a memory, aprocessor and a transceiver. The memory is configured to store aprogram, the processor is configured to execute the program, and whenthe program is executed, the processor executes the method in the secondaspect and any optional implementation modes thereof on the basis of thetransceiver.

A ninth aspect provides a network device, which includes a memory, aprocessor and a transceiver. The memory is configured to store aprogram, the processor is configured to execute the program, and whenthe program is executed, the processor executes the method in the thirdaspect and any optional implementation modes thereof on the basis of thetransceiver.

A tenth aspect provides a computer-readable medium, which stores aprogram code configured to be executed by a terminal device, the programcode including an instruction configured to execute the method in thefirst aspect or each implementation mode thereof.

An eleventh aspect provides a computer-readable medium, which stores aprogram code configured to be executed by a terminal device, the programcode including an instruction configured to execute the method in thesecond aspect or each implementation mode thereof.

A twelfth aspect provides a computer-readable medium, which stores aprogram code configured to be executed by a terminal device, the programcode including an instruction configured to execute the method in thethird aspect or each implementation mode thereof.

On the basis of the technical solutions, according to the informationtransmission methods of the embodiments of the application, a targetcell may measure a measured signal sent by a terminal device accordingto configuration information of the measured signal, thereby determiningthe beam corresponding to at least one uplink transmission channel ofthe target cell, and the target cell may transmit the at least oneuplink transmission channel through the beam corresponding to the atleast one uplink transmission channel. Since the beam, determined by thetarget cell, corresponding to the at least one uplink transmissionchannel of the target cell is determined according to the measuredsignal sent by the terminal device, the beam corresponding to the atleast one uplink transmission channel of the target cell is matchedrelatively well with a transmitting beam used by the terminal device,and the target cell may receive a random access related signal sent bythe terminal device through the beam corresponding to the at least oneuplink transmission channel of the target cell. Therefore, a randomaccess delay may be reduced.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a communication system according to anembodiment of the application.

FIG. 2 is a schematic flowchart of an intra-station handover methodaccording to a conventional art.

FIG. 3 is a schematic flowchart of an X2-interface-based inter-stationhandover method according to the conventional art.

FIG. 4 is a schematic flowchart of an S1-interface-based inter-stationhandover method according to the conventional art.

FIG. 5 is a schematic flowchart of an information transmission methodaccording to an embodiment of the application.

FIG. 6 is a schematic flowchart of an information transmission methodaccording to an embodiment of the application.

FIG. 7 is a schematic flowchart of an information transmission methodaccording to an embodiment of the application.

FIG. 8 is a schematic block diagram of a network device according to anembodiment of the application.

FIG. 9 is a schematic block diagram of a terminal device according to anembodiment of the application.

FIG. 10 is a schematic block diagram of a network device according to anembodiment of the application.

FIG. 11 is a schematic block diagram of a network device according to anembodiment of the application.

FIG. 12 is a schematic block diagram of a terminal device according toan embodiment of the application.

FIG. 13 is a schematic block diagram of a network device according to anembodiment of the application.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the application will bedescribed below in combination with the drawings in the embodiments ofthe application.

The technical solutions of the embodiments of the application may beapplied to various communication systems, for example, a Global Systemof Mobile Communication (GSM), a Code Division Multiple Access (CDMA)system, a Wideband Code Division Multiple Access (WCDMA) system, aGeneral Packet Radio Service (GPRS), a Long Term Evolution (LTE) system,an LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex(TDD) system, a Universal Mobile Telecommunication System (UMTS), aWorldwide Interoperability for Microwave Access (WiMAX) communicationsystem or a future 5G system.

FIG. 1 illustrates a wireless communication system 100 to which theembodiments of the application are applied. The wireless communicationsystem 100 may include a network device 110 and a network device 120.The network device 110 and the network device 120 may be devicescommunicating with a terminal device. The network device 110 and thenetwork device 120 may provide communication coverage for a specificgeographical region and may communicate with a terminal device (forexample, User Equipment (UE)) in the coverage. Optionally, each of thenetwork device 110 and the network device 120 may be a Base TransceiverStation (BTS) in a GSM or a CDMA system, or may be a NodeB (NB) in aWCDMA system, or may be an Evolutional Node B (eNB or eNodeB) in an LTEsystem or a wireless controller in a Cloud Radio Access Network (CRAN).Or the network device may be a relay station, an access point, aTransmission Reception Point (TRP), a vehicle-mounted device, a wearabledevice, a network-side device in a future 5G network, a network devicein a future evolved Public Land Mobile Network (PLMN) or the like.

The wireless communication system 100 further includes at least oneterminal device 130 within the coverage of the network device 110 or thenetwork device 120. The terminal devices 130 may be mobile or fixed.Optionally, the terminal device 130 may refer to an access terminal, UE,a user unit, a user station, a mobile station, a mobile radio station, aremote station, a remote terminal, a mobile device, a user terminal, aterminal, a wireless communication device, a user agent or a userdevice. The access terminal may be a cell phone, a cordless phone, aSession Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL)station, a Personal Digital Assistant (PDA), a handheld device with awireless communication function, a computing device, a processing deviceconnected to a wireless modem, a vehicle-mounted device, a wearabledevice, a terminal device in a future 5G network, a terminal device in afuture evolved PLMN or the like.

Optionally, the 5G system or network may also be called an NR system ornetwork.

Two network devices and a terminal device are exemplarily shown inFIG. 1. Optionally, the wireless communication system 100 may includemore network devices and other number of terminal devices may beincluded in coverage of each network device. There are no limits madethereto in the embodiments of the application.

Optionally, the wireless communication system 100 may further include anetwork controller, a mobility management entity or other networkentities. There are no limits made thereto in the embodiments of theapplication.

It is to be understood that terms “system” and “network” in thedisclosure may usually be exchanged in the disclosure. In thedisclosure, the term “and/or” is only an association relationshipdescribing associated objects and represents that three relationshipsmay exist. For example, A and/or B may represent three conditions: i.e.,independent existence of A, existence of both A and B and independentexistence of B. In addition, character “/” in the disclosure usuallyrepresents that former and latter associated objects form an “or”relationship.

A cell handover process includes a process that a terminal device whichis using network service moves from one cell (called a “source cell”) toanother cell (called a “target cell”) or that a communication linkbetween the terminal device and the source cell is transferred to thetarget cell due to wireless transmission service load regulation,activation operation maintenance, device failure and the like, forensuring communication continuity and quality of service.

In an LTE system, cell handover of a terminal device may includeintra-station handover (that is, a source cell and a target cell belongto the same network device) and inter-station handover (that is, thesource cell and the target cell belong to different network devices).The inter-station handover may further include X2-interface-basedhandover and S1-interface-based handover, and under the condition thatan X2 interface is complete in data configuration and works well,X2-interface-based handover may be performed. Generally speaking, apriority of X2-interface-based handover is higher than that ofS1-interface-based handover.

FIG. 2 is a schematic flowchart of an intra-station handover methodaccording to the conventional art. As shown in FIG. 2, an intra-stationhandover process may include the following operations.

In S201, a network device configures a measurement type of a terminaldevice. The network device sends a Radio Resource Control (RRC)connection reconfiguration message to the terminal device to configurethe measurement type of the terminal device.

In S202, the terminal device makes measurement configuration at an RRCprotocol end of the terminal device according to the measurement typetransmitted by the network device, and sends an RRC connectionreconfiguration complete message to the network device to indicate thatmeasurement configuration is completed.

In S203, the terminal device sends a measurement report to the networkdevice according to information of the measurement configuration.

In S204, the network device makes a handover decision according to themeasurement report, the network device being a network device to which asource cell and a target cell belong.

In S205, if such a decision that the terminal device executes handoverin the network device, i.e., intra-station handover, is made, resourceadmission is performed in the target cell, and after successful resourceadmission, the network device applies for a new air interface resourcefor the terminal device.

In S206, after successful resource application, the network device sendsthe RRC connection reconfiguration message to the terminal device toindicate the terminal device to initiate a handover.

In S207, the terminal device accesses the target cell, and then sendsthe RRC connection reconfiguration complete message to the networkdevice to indicate that the terminal device has accessed the targetcell.

In S208, the network device, after receiving the RRC connectionreconfiguration complete message, releases the resource used by theterminal device in the source cell.

Here, S201-S205 form a handover preparation, S206 and S207 form ahandover execution, and S208 represents a handover completion.

FIG. 3 is a schematic flowchart of an X2-interface-based inter-stationhandover method according to the conventional art. As shown in FIG. 3,an inter-station handover may include the following operations.

In S301, a source network device configures a measurement type of aterminal device. The source network device sends an RRC connectionreconfiguration message to the terminal device to configure themeasurement type of the terminal device, the source network device beinga network device to which a source cell belongs.

In S302, the terminal device makes measurement configuration at an RRCprotocol end of the terminal device according to the measurement typetransmitted by the source network device, and sends an RRC connectionreconfiguration complete message to the source network device toindicate that measurement configuration is completed.

In S303, the terminal device sends a measurement report to the sourcenetwork device according to measurement configuration information.

In S304, the source network device makes a handover decision accordingto the measurement report.

In S305, the source network device sends a handover request message to atarget network device to indicate the target network device to makehandover preparations, the target network device being a network deviceto which a target cell belongs.

In S306, the target network device makes resource admission andallocates an air interface resource and a System Architecture Evolution(SAE) bearer resource of a service for access of the terminal device.

In S307, the target network device, after successful resource admission,sends a handover request confirmation message to the source networkdevice to indicate that handover preparations are completed.

In S308, the source network device configures an allocated dedicatedaccess signature for the terminal device, and sends an RRC connectionreconfiguration message to the terminal device to indicate the terminaldevice to execute a handover operation.

In S309, the terminal device sends an RRC connection reconfigurationcomplete message to the target network device to indicate that theterminal device has accessed the target cell.

In S310, the target network device sends a path switch request (PATHSWITCH REQ) to a Mobility Management Entity (MME) to request the MME toupdate a node address of a service data channel and notify the MME toswitch a connection path of service data.

In S311, the MME successfully updates the node address of the datachannel, and sends a path switch request confirmation message to thetarget network device to indicate that service communication is allowedto be performed on a new SAE bearer.

In S312, since the terminal device has accessed the target cell and mayperform service communication in the target cell, a resource used in thesource cell is required to be released, and the target network devicesends a terminal device context release message to the source networkdevice.

In S313, the source network device releases context information of theterminal device, including the air interface resource and the SAE bearerresource.

FIG. 4 is a schematic flowchart of S1-interface-based inter-stationhandover according to the conventional art. As shown in FIG. 4, aninter-station handover process may include the following operations.

In S401, a source network device configures a measurement type of aterminal device. The network device sends an RRC connectionreconfiguration message to the terminal device to configure themeasurement type of the terminal device.

In S402, the terminal device makes measurement configuration at an RRCprotocol end of the terminal device according to the measurement typetransmitted by the source network device, and sends an RRC connectionreconfiguration complete message to the source network device toindicate that measurement configuration is completed.

In S403, the terminal device sends a measurement report to the sourcenetwork device according to information about the measurementconfiguration.

In S404, the source network device makes a handover decision accordingto the measurement report.

In S405, the source network device sends a handover request message toan MME.

In S406, the MME sends the handover request message to a target networkdevice.

In S407, the target network device makes resource admission andallocates a resource of a target network device side for access of theterminal device.

In S408, the target network device, after successful resource admission,sends a handover request confirmation message to the MME to indicatethat handover preparations are completed.

In S409, the MME sends a handover command to the source network device,the handover command including bearer information of the target networkdevice side and an address of the target network device for forwardingservice data during handover.

In S410, the source network device sends an RRC connectionreconfiguration message to the terminal device to indicate the terminaldevice to access a target cell.

In S411, the target network device receives from the terminal device anRRC connection reconfiguration complete message indicating successfulhandover.

In S412, the target network device sends a path switch request to theMME to request the MME to update a node address of a service datachannel and notify the MME to switch a connection path of service data.

In S413, the MME successfully updates the node address of the datachannel, and sends a path switch request confirmation message to thetarget network device to indicate that service communication is allowedto be performed on a new SAE bearer.

In S414, the target network device sends a handover notify message tothe MME to notify the MME that the terminal device has successfullyaccessed the target cell in the target network device.

In S415, the target network device sends a context release message tothe source network device.

In S416, the source network device releases context information of theterminal device, including an air interface resource and an SAE bearerresource.

An information transmission method 500 of the embodiments of theapplication will be described below in combination with FIG. 5 from theaspect of a target cell. Specifically, the method 500 may be executed bya network device to which the target cell belongs. As shown in FIG. 5,the method 500 includes the following operations.

In S501, the target cell acquires configuration information of ameasured signal, the configuration information of the measured signalbeing used for a terminal device to send the measured signal accordingto the configuration information of the measured signal.

In S502, the target cell determines a beam corresponding to at least oneuplink transmission channel of the target cell according to the measuredsignal sent by the terminal device.

In S503, the target cell transmits the at least one uplink transmissionchannel through the beam corresponding to the at least one uplinktransmission channel of the target cell.

Specifically, the target cell may acquire the configuration informationof the measured signal. Optionally, the configuration information of themeasured signal may be determined by negotiation between a source celland the target cell, and in such case, the target cell may directlyacquire the configuration information of the measured signal. Or theconfiguration information of the measured signal may also be sent to thetarget cell by the source cell. For example, the source cell maydetermine information of a signal which is being periodically sent atpresent by the terminal device as the configuration information of themeasured signal, and then may send the determined configurationinformation of the measured signal to the target cell.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

The target cell, after acquiring the configuration information of themeasured signal, may measure the measured signal on a resource indicatedby the configuration information of the measured signal, therebydetermining the beam corresponding to the at least one uplinktransmission channel of the target cell. Then, the target cell maytransmit the at least one uplink transmission channel through thedetermined beam corresponding to the at least one uplink transmissionchannel. Since the beam corresponding to the at least one uplinktransmission channel is determined by measuring, by the target cell, themeasured signal sent by the terminal device, the beam corresponding tothe at least one uplink transmission channel has relatively highreceiving performance, and uplink transmission performance is furtherimproved.

Optionally, in some embodiments, the method further includes thefollowing operations.

The target cell determines identification information of a beamcorresponding to at least one uplink transmission channel of theterminal device and/or resource information for transmission of the atleast one uplink transmission channel according to the measured signalsent by the terminal device.

The target cell sends a first notification message to a source cell, thefirst notification message including the identification information ofthe beam corresponding to the at least one uplink transmission channelof the terminal device and/or the resource information for transmissionof the at least one uplink transmission channel, which are/is determinedby the target cell.

Specifically, the target cell may further determine the identificationinformation of the beam corresponding to the at least one uplinktransmission channel of the terminal device and/or the resourceinformation for transmission of the at least one uplink transmissionchannel according to the measured signal sent by the terminal device.The target cell may further send the first notification message to thesource cell to notify the source cell of the identification informationof the beam corresponding to the at least one uplink transmissionchannel of the terminal device and/or the resource information fortransmission of the at least one uplink transmission channel, whichare/is determined by the target cell. Since the terminal device has yetnot accessed the target cell and may not communicate with the targetcell, the source cell may forward the message determined by the targetcell to the terminal device, and then the terminal device may access thetarget cell through a resource indicated by the message, therebyavoiding a long access delay caused by the fact that the terminaldevice, when accessing the target cell, is required to try differenttransmitting beams to send a random access related signal.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by negotiation between the source cell andthe target cell.

That is, the source cell and the target cell belong to different networkdevices, and the configuration information of the measured signal may bedetermined by signaling interaction between the two network devices. Orif the source cell and the target cell belong to the same networkdevice, the configuration information of the measured signal may bedetermined by the network device.

Optionally, in some embodiments, the operation that the target cellacquires the configuration information of the measured signal includesthe following operation.

The target cell receives the configuration information of the measuredsignal from the source cell, the configuration information of themeasured signal being determined by the source cell according toinformation of a signal periodically sent by the terminal device.

Specifically, the configuration information of the measured signal maybe determined by the source cell. If the terminal device is periodicallysending a first signal, the source cell may also determine theconfiguration information of the measured signal according toinformation of the first signal, that is, the signal presently sent bythe terminal device may be used as the measured signal measured by thetarget cell.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or a serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, in some embodiments, the source cell and the target cellbelong to the same network device.

Under this condition, handover of the terminal device between the sourcecell and the target cell is intra-station handover, and negotiationabout the configuration information of the measured signal between thesource cell and the target cell and sending of the first notificationmessage from the target cell to the source cell may both be executed inS205 shown in FIG. 2.

Optionally, in some embodiments, the source cell and the target cellbelong to different network devices.

Under this condition, handover of the terminal device between the sourcecell and the target cell is inter-station handover. ForX2-interface-based inter-station handover, negotiation about theconfiguration information of the measured signal between the source celland the target cell or sending of the first notification message fromthe target cell to the source cell may be executed in S305 and S307shown in FIG. 3, that is, the source cell and the target cell maynegotiate about the configuration information of the measured signalthrough a handover request message and a handover request confirmationmessage, or the first notification message may be the handover requestconfirmation message. Or, for S1-interface-based inter-station handover,negotiation about the configuration information of the measured signalbetween the source cell and the target cell or sending of the firstnotification message from the target cell to the source cell may beexecuted in part of operations in S405, S406, S408 and S409 shown inFIG. 4.

The information transmission method of the embodiments of the disclosureis described above in combination with FIG. 5 in detail from the aspectof the target cell and the information transmission method of theembodiments of the disclosure will be described below in combinationwith FIG. 6 in detail from the aspect of a terminal device. It is to beunderstood that descriptions made on a target cell side correspond todescriptions made on a terminal device side, and similar descriptionsmay refer to the above and, for avoiding repetitions, will not beelaborated herein.

FIG. 6 is a schematic flowchart of an information transmission method600 described from the aspect of a terminal device according to anembodiment of the application. As shown in FIG. 6, the method 600includes the following operations.

In S601, the terminal device sends a measured signal, the measuredsignal being used for a target cell to determine identificationinformation of a beam corresponding to at least one uplink transmissionchannel of the terminal device and/or resource information fortransmission of the at least one uplink transmission channel.

In S602, the terminal device receives a notification message from asource cell, the notification message including the identificationinformation of the beam corresponding to the at least one uplinktransmission channel of the terminal device and/or the resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the target cell.

Specifically, the terminal device may send a measured signal, and themeasured signal may be configured for the target cell to measure themeasured signal to determine the identification information of the beamcorresponding to the at least one uplink transmission channel of theterminal device and/or the resource information for transmission of theat least one uplink transmission channel. The terminal device mayfurther receive the notification message from the source cell, thenotification message including the information determined by the targetcell, so that the terminal device may transmit the uplink transmissionchannel through the beam corresponding to the at least one uplinktransmission channel of the terminal device. Since the beamcorresponding to the at least one uplink transmission channel of theterminal device is determined by measuring, by the target cell, themeasured signal, the terminal device may directly access the target cellthrough the beam corresponding to the at least one uplink transmissionchannel, thereby avoiding a long access delay caused by the fact thateach transmitting beam is sequentially tried to be used for sending asignal and then determining the transmitting beam with a relatively highmatching degree with a receiving beam of the target cell.

Optionally, in some embodiments, the measured signal is further used forthe target cell to determine a beam corresponding to at least one uplinktransmission channel of the target cell.

That is, according to the measured signal, the target cell may not onlydetermine the beam (the beam is a transmitting beam for uplinktransmission) corresponding to the at least one uplink transmissionchannel of the terminal device but also determine the beam (the beam isa receiving beam for uplink transmission) corresponding to the at leastone uplink transmission channel of the target cell, and the transmittingbeam and the receiving beam are beams with a relatively high matchingdegree, so that the target cell may use the beam corresponding to the atleast one uplink transmission channel of the target cell and theterminal device may use the beam corresponding to the at least oneuplink transmission channel of the terminal device for uplinktransmission. Therefore, uplink transmission performance is improved.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, in some embodiments, the measured signal is a signalperiodically sent by the terminal device.

Specifically, if the terminal device is periodically sending a firstsignal, the source cell may also determine the configuration informationof the measured signal according to information of the first signal,that is, the signal presently sent by the terminal device may be used asthe measured signal measured by the target cell.

Optionally, in some embodiments, the method further includes thefollowing operation.

The terminal device receives configuration information of the measuredsignal from the source cell, the configuration information of themeasured signal being determined by negotiation between the source cell,and the target cell and the configuration information of the measuredsignal being used for the terminal device to send the measured signalaccording to the configuration information of the measured signal.

Here, the configuration information of the measured signal includes atleast one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal and a manner for sending the measuredsignal.

That is, the configuration information of the measured signal may bedetermined by signaling interaction between the source cell and thetarget cell. If the source cell and the target cell belong to differentnetwork devices, the configuration information of the measured signalmay be determined by signaling interaction between the two networkdevices. If the source cell and the target cell belong to the samenetwork device, the configuration information of the measured signal maybe determined by the network device.

Optionally, in some embodiments, the method further includes thefollowing operation.

The terminal device sends a random access signal on a resource indicatedby the resource information for transmission of the at least one uplinktransmission channel through the beam corresponding to theidentification information, determined by the target cell, of the beamcorresponding to the at least one uplink transmission channel of theterminal device to access the target cell.

Specifically, the terminal device, after receiving the notificationmessage sent by the source cell, may acquire the identificationinformation of the beam corresponding to the at least one uplinktransmission channel of the terminal device and/or the resourceinformation for transmission of the at least one uplink transmissionchannel, so that the terminal device sends the random access relatedsignal, for example, a random access preamble, on the resource indicatedby the resource information for transmission of the at least one uplinktransmission channel through the beam corresponding to theidentification information of the beam corresponding to the at least oneuplink transmission channel of the terminal device to access the targetcell.

Optionally, in some embodiments, the source cell and the target cellbelong to the same network device.

Under this condition, handover of the terminal device between the sourcecell and the target cell is intra-station handover, and negotiationabout the configuration information of the measured signal between thesource cell and the target cell may be executed in S205 shown in FIG. 2,and reception of the notification message by the terminal device fromthe source cell may be executed in S206 shown in FIG. 2.

Optionally, in some embodiments, the source cell and the target cellbelong to different network devices.

Under this condition, handover of the terminal device between the sourcecell and the target cell is inter-station handover. ForX2-interface-based inter-station handover, reception of the notificationmessage by the terminal device from the source cell may be executed inS308 shown in FIG. 3. Or, for S1-interface-based inter-station handover,reception of the notification message by the terminal device from thesource cell may be executed in S410 shown in FIG. 4.

The information transmission method of the embodiments of the disclosureis described above in combination with FIG. 5 and FIG. 6 in detail fromthe aspect of the target cell and the terminal device, and theinformation transmission method of the embodiments of the disclosurewill be described below in combination with FIG. 7 in detail from theaspect of a source device. It is to be understood that descriptions madeon a source cell side correspond to descriptions made on a terminaldevice and target cell side, and similar descriptions may refer to theabove and, for avoiding repetitions, will not be elaborated herein.

FIG. 7 is a schematic flowchart of an information transmission method700 described from the aspect of a source cell according to anembodiment of the application. Specifically, the method 700 may beexecuted by a network device to which the source cell belongs. As shownin FIG. 7, the method 700 includes the following contents.

In S701, the source cell receives a first notification message sent by atarget cell, the first notification message including identificationinformation of a beam corresponding to at least one uplink transmissionchannel of a terminal device and/or resource information fortransmission of the at least one uplink transmission channel, whichare/is determined by the target cell.

In S702, the source cell sends a second notification message to theterminal device, the second notification message including theidentification information of the beam corresponding to the at least oneuplink transmission channel of the terminal device and/or the resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the target cell.

Specifically, the source cell and the target cell may be cells under thesame network device or cells under different network devices. The sourcecell may receive the first notification message sent by the target cell,the first notification message including the identification informationof the beam corresponding to the at least one uplink transmissionchannel of the terminal device and/or the resource information fortransmission of the at least one uplink transmission channel, whichare/is determined by the target cell. The source cell may also send thesecond notification message to the terminal device, the secondnotification message including the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel, which are/is determined bythe target cell, so that the terminal device may know about the specificbeam to be used for sending a random access related signal, for example,a random access preamble, to the target cell before handover to thetarget cell, and is not required to sequentially try using eachtransmitting beam to send the random access related signal. Therefore, arandom access delay is reduced.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel are/is determined bymeasuring, by the target cell, a measured signal on a resource indicatedby configuration information of the measured signal, and the measuredsignal is sent by the terminal device on the resource indicated by theconfiguration information of the measured signal.

That is, the terminal device may send the measured signal on theresource indicated by the configuration information of the measuredsignal, and the target cell may measure the measured signal sent by theterminal device on the resource, thereby determining the identificationinformation of the beam corresponding to the at least one uplinktransmission channel of the terminal device, or the resource informationfor transmission of the at least one uplink transmission channel, or theidentification information of the beam corresponding to the at least oneuplink transmission channel and the resource information fortransmission of the at least one uplink transmission channel.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by negotiation between the source cell andthe target cell.

That is, the configuration information of the measured signal may bedetermined by signaling interaction between the source cell and thetarget cell. If the source cell and the target cell belong to differentnetwork devices, the configuration information of the measured signalmay be determined by signaling interaction between the two networkdevices. If the source cell and the target cell belong to the samenetwork device, the configuration information of the measured signal maybe determined by the network device.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by the source cell according toinformation of a signal periodically sent by the terminal device, andthe method further includes the following operation.

The source cell sends the configuration information of the measuredsignal to the target cell.

Specifically, if the terminal device is periodically sending a firstsignal, the source cell may also determine the configuration informationof the measured signal according to information of the first signal,that is, the signal presently sent by the terminal device may be used asthe measured signal measured by the target cell.

The manner for sending the measured signal may include periodic sending,aperiodic sending, triggered sending or the like.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, in some embodiments, the source cell and the target cellbelong to the same network device.

Under this condition, handover of the terminal device between the sourcecell and the target cell is intra-station handover. Negotiation aboutthe configuration information of the measured signal between the sourcecell and the target cell and sending of the first notification messagefrom the target cell to the source cell may both be executed in S205shown in FIG. 2. Sending of the notification message from the sourcecell to the terminal device may be executed in S206.

Optionally, in some embodiments, the source cell and the target cellbelong to different network devices.

Under this condition, handover of the terminal device between the sourcecell and the target cell is inter-station handover. ForX2-interface-based handover, negotiation about the configurationinformation of the measured signal between the source cell and thetarget cell or sending of the first notification message from the targetcell to the source cell may be executed in S305 and S307 shown in FIG.3. That is, the source cell and the target cell may negotiate about theconfiguration information of the measured signal through a handoverrequest message and a handover request confirmation message, or thefirst notification message may be the handover request confirmationmessage. Sending of the notification message from the source cell to theterminal device may be executed in S308 shown in FIG. 3, that is, thenotification message may be an RRC connection reconfiguration message.Or, for S1-interface-based inter-station handover, negotiation about theconfiguration information of the measured signal between the source celland the target cell may be executed in part of operations in S405, S406,S408 and S409 shown in FIG. 4. Sending of the notification message fromthe source cell to the terminal device may be executed in S410 shown inFIG. 4, that is, the notification message may be the RRC connectionreconfiguration message.

The information transmission method according to the embodiments of theapplication are introduced above in combination with FIG. 5 to FIG. 7,and device embodiments according to the embodiments of the applicationwill be introduced below in combination with FIG. 8 to FIG. 13. It is tobe understood that the device embodiments correspond to the methodembodiments and similar descriptions may refer to the methodembodiments.

The information transmission method according to the embodiments of theapplication are introduced above in combination with FIG. 5 to FIG. 7,and a device according to the embodiments of the application will beintroduced below in combination with FIG. 8 to FIG. 13.

FIG. 8 is a schematic block diagram of a network device according to anembodiment of the application. As shown in FIG. 8, the network device800 includes an acquisition unit 810, a determination unit 820 and atransceiver unit 830.

The acquisition unit 810 is configured to acquire configurationinformation of a measured signal, the configuration information of themeasured signal being used for a terminal device to send the measuredsignal according to the configuration information of the measuredsignal.

The determination unit 820 is configured to determine a beamcorresponding to at least one uplink transmission channel of the networkdevice according to the measured signal sent by the terminal device.

The transceiver unit 830 is configured to transmit the at least oneuplink transmission channel through the beam corresponding to the atleast one uplink transmission channel of the network device, the networkdevice being a network device to which a target cell belongs.

Optionally, in some embodiments, the determination unit 820 is furtherconfigured to:

determine identification information of a beam corresponding to at leastone uplink transmission channel of the terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel according to the measured signal sent by the terminal device.

The transceiver unit 830 is further configured to:

send a first notification message to a first network device, the firstnotification message including the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel, which are/is determined bythe network device, and the first network device being a network deviceto which a source cell belongs.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by negotiation between the first networkdevice and the network device.

Optionally, in some embodiments, the transceiver unit 830 is furtherconfigured to:

receive the configuration information of the measured signal from thefirst network device, the configuration information of the measuredsignal being determined by the first network device according toinformation of a signal periodically sent by the terminal device.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the first network device and the network device are the samenetwork device.

For example, the first network device and the network device may be thesame physical base station.

Optionally, in some embodiments, the first network device and thenetwork device are different network devices.

For example, the first network device and the network device may bedifferent physical base stations.

It is to be understood that the network device 800 may correspond to atarget cell in the method 500, which may realize corresponding functionsof the target cell and will not be elaborated herein for simplicity.

FIG. 9 is a schematic block diagram of a terminal device according to anembodiment of the application. As shown in FIG. 9, the terminal device900 includes a transmitting unit 910 and a receiving unit 920.

The transmitting unit 910 is configured to send a measured signal, themeasured signal being used for a first network device to determineidentification information of a beam corresponding to at least oneuplink transmission channel of the terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel, and the first network device being a network device to which atarget cell belongs.

The receiving unit 920 is configured to receive a notification messagefrom a second network device, the notification message including theidentification information of the beam corresponding to the at least oneuplink transmission channel of the terminal device and/or the resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the second network device, and thesecond network device being a network device to which a source cellbelongs.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel, and information about afrequency-domain resource for transmitting the at least one uplinktransmission channel.

Optionally, in some embodiments, the measured signal is a signalperiodically sent by the terminal device.

Optionally, in some embodiments, the receiving unit 920 is furtherconfigured to:

receive configuration information of the measured signal from the secondnetwork device, the configuration information of the measured signalbeing determined by negotiation between the first network device and thesecond network device, and the configuration information of the measuredsignal being used for the terminal device to send the measured signalaccording to the configuration information of the measured signal.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

Optionally, in some embodiments, the transmitting unit 910 is furtherconfigured to:

send a random access signal on a resource indicated by the resourceinformation for transmission of the at least one uplink transmissionchannel through the beam corresponding to the identificationinformation, determined by the first network device, of the beamcorresponding to the at least one uplink transmission channel of theterminal device to access the second network device.

Optionally, in some embodiments, the measured signal is further used forthe first network device to determine a beam corresponding to at leastone uplink transmission channel of the first network device.

Optionally, the first network device and the second network device arethe same network device.

For example, the first network device and the second network device maybe the same physical base station.

Optionally, in some embodiments, the first network device and the secondnetwork device are different network devices.

For example, the first network device and the second network device maybe different physical base stations.

It is to be understood that the terminal device 900 may correspond to aterminal device in the method 600, which may realize correspondingfunctions of the terminal device and will not be elaborated herein forsimplicity.

FIG. 10 is a schematic block diagram of a network device according to anembodiment of the application. As shown in FIG. 10, the network device1000 includes a receiving unit 1010 and a transmitting unit 1020.

The receiving unit 1010 is configured to receive a first notificationmessage from a first network device, the first notification messageincluding identification information of a beam corresponding to at leastone uplink transmission channel of a terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the first network device, thenetwork device being a network device to which a source cell belongs andthe first network device being a network device to which a target cellbelongs.

The transmitting unit 1020 is configured to send a second notificationmessage to the terminal device, the second notification messageincluding the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal deviceand/or the resource information for transmission of the at least oneuplink transmission channel, which are/is determined by the firstnetwork device.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel are/is determined bymeasuring, by the first network device, a measured signal on a resourceindicated by configuration information of the measured signal, and themeasured signal is sent by the terminal device on the resource indicatedby the configuration information of the measured signal.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by negotiation between the network deviceand the first network device.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by the network device according toinformation of a signal periodically sent by the terminal device, andthe transmitting unit 1020 is further configured to:

send the configuration information of the measured signal to the firstnetwork device.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal and a manner for sending the measuredsignal.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channelincludes a beam identifier or serial number of the beam corresponding tothe at least one uplink transmission channel.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the first network device and the network device are the samenetwork device.

For example, the first network device and the network device may be thesame physical base station.

Optionally, in some embodiments, the first network device and thenetwork device are different network devices.

For example, the first network device and the network device may bedifferent physical base stations.

It is to be understood that the network device 1000 may correspond to asource cell in the method 700, which may realize corresponding functionsof the source cell and will not be elaborated herein for simplicity.

FIG. 11 is a schematic block diagram of a network device according to anembodiment of the application. As shown in FIG. 11, the network device1100 includes a memory 1110, a processor 1120 and a transceiver 1130.The memory 1110 is configured to store a program. The processor 1120 isconfigured to execute the program. When the program is executed, theprocessor 1120 is configured to acquire configuration information of ameasured signal, the configuration information of the measured signalbeing used for a terminal device to send the measured signal accordingto the configuration information of the measured signal, and determine abeam corresponding to at least one uplink transmission channel of thenetwork device according to the measured signal sent by the terminaldevice. The transceiver 1130 is configured to transmit the at least oneuplink transmission channel through the beam corresponding to the atleast one uplink transmission channel of the network device, the networkdevice being a network device to which a target cell belongs.

Optionally, in some embodiments, the processor 1120 is furtherconfigured to:

determine identification information of a beam corresponding to at leastone uplink transmission channel of the terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel according to the measured signal sent by the terminal device.

The transceiver 1130 is further configured to:

send a first notification message to a first network device, the firstnotification message including the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel, which are/is determined bythe network device, the first network device being a network device towhich a source cell belongs.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by negotiation between the first networkdevice and the network device.

Optionally, in some embodiments, the transceiver 1130 is furtherconfigured to:

receive the configuration information of the measured signal from thefirst network device, the configuration information of the measuredsignal being determined by the first network device according toinformation of a signal periodically sent by the terminal device.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the first network device and the network device are the samenetwork device.

For example, the first network device and the network device may be thesame physical base station.

Optionally, in some embodiments, the first network device and thenetwork device are different network devices.

For example, the first network device and the network device may bedifferent physical base stations.

It is to be understood that the network device 1100 may correspond to atarget cell in the method 500, which may realize corresponding functionsof the target cell and will not be elaborated herein for simplicity.

FIG. 12 is a schematic block diagram of a terminal device according toan embodiment of the application. As shown in FIG. 12, the terminaldevice 1200 includes: a memory 1210, a processor 1220 and a transceiver1230.

The memory 1210 is configured to store a program. The processor 1220 isconfigured to execute the program. The processor 1220 may execute theprogram to control the transceiver 1230 to send a measured signal, themeasured signal being used for a first network device to determineidentification information of a beam corresponding to at least oneuplink transmission channel of the terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel, the first network device being a network device to which atarget cell belongs, and receive a notification message from a secondnetwork device, the notification message including the identificationinformation of the beam corresponding to the at least one uplinktransmission channel of the terminal device and/or the resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the second network device, and thesecond network device being a network device to which a source cellbelongs.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device includes a beam identifier or serial number of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, in some embodiments, the measured signal is a signalperiodically sent by the terminal device.

Optionally, in some embodiments, the transceiver 1230 is furtherconfigured to:

receive configuration information of the measured signal from the secondnetwork device, the configuration information of the measured signalbeing determined by negotiation between the first network device and thesecond network device, and the configuration information of the measuredsignal being used for the terminal device to send the measured signalaccording to the configuration information of the measured signal.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

Optionally, in some embodiments, the transceiver 1230 is furtherconfigured to:

send a random access signal on a resource indicated by the resourceinformation for transmission of the at least one uplink transmissionchannel through the beam corresponding to the identificationinformation, determined by the first network device, of the beamcorresponding to the at least one uplink transmission channel of theterminal device to access the second network device.

Optionally, in some embodiments, the measured signal is further used forthe first network device to determine a beam corresponding to at leastone uplink transmission channel of the first network device.

Optionally, the first network device and the second network device arethe same network device.

For example, the first network device and the second network device maybe the same physical base station.

Optionally, in some embodiments, the first network device and the secondnetwork device are different network devices.

For example, the first network device and the second network device maybe different physical base stations.

It is to be understood that the terminal device 1200 may correspond to aterminal device in the method 600, which may realize correspondingfunctions of the terminal device and will not be elaborated herein forsimplicity.

FIG. 13 is a schematic block diagram of a network device according to anembodiment of the application. As shown in FIG. 13, the network device1300 includes a memory 1310, a processor 1320 and a transceiver 1330.The memory 1310 is configured to store a program. The processor 1320 isconfigured to execute the program. The processor 1320 may execute theprogram to control the transceiver 1330 to receive a first notificationmessage from a first network device, the first notification messageincluding identification information of a beam corresponding to at leastone uplink transmission channel of a terminal device and/or resourceinformation for transmission of the at least one uplink transmissionchannel, which are/is determined by the first network device, thenetwork device being a network device to which a source cell belongs andthe first network device being a network device to which a target cellbelongs, and send a second notification message to the terminal device.The second notification message includes the identification informationof the beam corresponding to the at least one uplink transmissionchannel of the terminal device and/or the resource information fortransmission of the at least one uplink transmission channel, whichare/is determined by the first network device.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channel ofthe terminal device and/or the resource information for transmission ofthe at least one uplink transmission channel are/is determined bymeasuring, by the first network device, a measured signal on a resourceindicated by configuration information of the measured signal, and themeasured signal is sent by the terminal device on the resource indicatedby the configuration information of the measured signal.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by negotiation between the network deviceand the first network device.

Optionally, in some embodiments, the configuration information of themeasured signal is determined by the network device according toinformation of a signal periodically sent by the terminal device, andthe transceiver 1330 is further configured to:

send the configuration information of the measured signal to the firstnetwork device.

Optionally, in some embodiments, the configuration information of themeasured signal includes at least one of:

information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, and a manner for sending the measuredsignal.

Optionally, in some embodiments, the identification information of thebeam corresponding to the at least one uplink transmission channelincludes a beam identifier or number of the beam corresponding to the atleast one uplink transmission channel.

The resource information for transmission of the at least one uplinktransmission channel includes at least one of:

information about a time-domain resource for transmitting the at leastone uplink transmission channel and information about a frequency-domainresource for transmitting the at least one uplink transmission channel.

Optionally, the first network device and the network device are the samenetwork device.

For example, the first network device and the network device may be thesame physical base station.

Optionally, in some embodiments, the first network device and thenetwork device are different network devices.

For example, the first network device and the network device may bedifferent physical base stations.

It is to be understood that the network device 1300 may correspond to asource cell in the method 700, which may realize corresponding functionsof the source cell and will not be elaborated herein for simplicity.

It is to be understood that the term “and/or” in the disclosure is onlyan association relationship describing associated objects and representsthat three relationships may exist. For example, A and/or B mayrepresent three conditions: i.e., independent existence of A, existenceof both A and B and independent existence of B. In addition, character“/” in the disclosure usually represents that former and latterassociated objects form an “or” relationship.

It is to be understood that, in various embodiments of the application,a magnitude of a sequence number of each process does not mean anexecution sequence and the execution sequence of each process should bedetermined by its function and an internal logic, and should not formany limit to an implementation process of the embodiments of theapplication.

Those of ordinary skill in the art may realize that the units andalgorithm steps of each example described in combination with theembodiments disclosed in the disclosure may be implemented by electronichardware or a combination of computer software and the electronichardware. Whether these functions are executed by hardware or softwaredepends on specific applications and design constraints of the technicalsolutions. Professionals may realize the described functions for eachspecific application through different methods, but such realizationshall fall within the scope of the application.

Those skilled in the art may clearly learn about that specific workingprocesses of the system, devices and units described above may refer tothe corresponding processes in the method embodiment and will not beelaborated herein for convenient and brief description.

In some embodiments provided by the application, it is to be understoodthat the disclosed system, devices and methods may be implemented inother manners. For example, the device embodiments described above areonly schematic, and for example, division of the units is only logicfunction division, and other division manners may be adopted duringpractical implementation. For example, multiple units or components maybe combined or integrated into a system, or some characteristics may beneglected or not executed. In addition, coupling or direct coupling orcommunication connection between each displayed or discussed componentmay be indirect coupling or communication connection, implementedthrough some interfaces, of the device or the units, and may beelectrical and mechanical or adopt other forms.

The units described as separate parts may or may not be physicallyseparated, and parts displayed as units may or may not be physicalunits, namely, may be located in the same place, or may also bedistributed to multiple network units. Part or all of the units may beselected to achieve the purpose of the solutions of the embodimentsaccording to a practical requirement.

In addition, each functional unit in each embodiment of the applicationmay be integrated into a processing unit, each unit may also physicallyexist independently, and two or more than two units may also beintegrated into a unit.

When being realized in form of software functional unit and sold or usedas an independent product, the function may also be stored in acomputer-readable storage medium. Based on such an understanding, thetechnical solutions of the application substantially or parts makingcontributions to the conventional art or part of the technical solutionsmay be embodied in form of software product, and the computer softwareproduct is stored in a storage medium, including a plurality ofinstructions configured to enable a computer device (which may be apersonal computer, a server, a network device or the like) to executeall or part of the steps of the method in each embodiment of theapplication. The abovementioned storage medium includes: various mediacapable of storing program codes such as a U disk, a mobile hard disk, aRead-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk oran optical disk.

The above is only the specific implementation mode of the applicationand not intended to limit the scope of protection of the application.Any variations or replacements apparent to those skilled in the artwithin the technical scope disclosed by the application shall fallwithin the scope of protection of the application. Therefore, the scopeof protection of the application shall be subject to the scope ofprotection of the claims.

The invention claimed is:
 1. An information transmission method,comprising: sending, by a terminal device, a measured signal, whereinthe measured signal is used for a target cell to determine resourceinformation for transmission of at least one uplink transmissionchannel; and receiving, by the terminal device, a notification messagefrom a source cell, wherein the notification message comprises theresource information for transmission of the at least one uplinktransmission channel; and sending, by the terminal device, a randomaccess signal on a resource indicated by the resource information fortransmission of the at least one uplink transmission channel through abeam corresponding to identification information, determined by thetarget cell, of a beam corresponding to the at least one uplinktransmission channel of the terminal device to access the target cell,wherein the measured signal is further configured for the target cell todetermine the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal device; thenotification message further comprises the identification information ofthe beam corresponding to the at least one uplink transmission channelof the terminal device; the identification information of the beamcorresponding to the at least one uplink transmission channel of theterminal device comprises a beam identifier or serial number of the beamcorresponding to the at least one uplink transmission channel of theterminal device; and the resource information for transmission of the atleast one uplink transmission channel comprises at least one of:information about a time-domain resource, or information about afrequency-domain resource for transmitting the at least one uplinktransmission channel of the terminal device.
 2. The method of claim 1,wherein the measured signal is a signal periodically sent by theterminal device.
 3. The method of claim 1, further comprising:receiving, by the terminal device, configuration information of themeasured signal from the source cell, wherein the configurationinformation of the measured signal is determined by negotiation betweenthe source cell and the target cell and is used for the terminal deviceto send the measured signal according to the configuration informationof the measured signal.
 4. The method of claim 3, wherein theconfiguration information of the measured signal comprises at least oneof: information about a time-domain resource for sending the measuredsignal, information about a frequency-domain resource for sending themeasured signal, information about a channel or signal resource forsending the measured signal, or, a manner for sending the measuredsignal.
 5. A terminal device, comprising a transceiver configured to:send a measured signal, wherein the measured signal is configured for atarget cell to determine resource information for transmission of atleast one uplink transmission channel, and receive a notificationmessage from a source cell, wherein the notification message comprisesthe resource information for transmission of the at least one uplinktransmission channel, wherein the terminal device sends a random accesssignal on a resource indicated by the resource information fortransmission of the at least one uplink transmission channel through abeam corresponding to identification information, determined by thetarget cell, of a beam corresponding to the at least one uplinktransmission channel of the terminal device to access the target cell,wherein the measured signmal is further configured for the target cellto determine the identification information of the beam corresponding tothe at least one uplink transmission channel of the terminal device, thenotification message further comprises the identification information ofthe beam corresponding to the at least one uplink transmission channelof the terminal device, the identification information of the beamcorresponding to the at least one uplink transmission channel of theterminal device comprises a beam identifier or serial number of the beamcorresponding to the at least one uplink transmission channel of theterminal device; and the resource information for transmission of the atleast one uplink transmission channel comprises at least one of:information about a time-domain resource, or information about afrequency-domain resource for transmitting the at least one uplinktransmission channel.
 6. The terminal device of claim 5, wherein themeasured signal is a signal periodically sent by the terminal device. 7.The terminal device of claim 5, wherein the transceiver is furtherconfigured to: receive configuration information of the measured signalfrom the source cell, wherein the configuration information of themeasured signal is determined by negotiation between the target cell andthe source cell, and the configuration information of the measuredsignal is used for the terminal device to send the measured signalaccording to the configuration information of the measured signal. 8.The terminal device of claim 7, wherein the configuration information ofthe measured signal comprises at least one of: information about atime-domain resource for sending the measured signal, information abouta frequency-domain resource for sending the measured signal, informationabout a channel or signal resource for sending the measured signal, or,a manner for sending the measured signal.
 9. The terminal device ofclaim 5, wherein the measured signal is further configured for thetarget cell to determine a beam corresponding to at least one uplinktransmission channel of the target cell.